She continued, "We always laugh about people saying she transitioned to be famous. Which is crazy. Caitlyn has to tell her story, because if she doesn't, everyone else is going to tell it for her."
Cyrus also talked in depth about her own struggles with body issues and anxiety that stemmed from growing up on Hannah Montana.
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"From the time I was 11, it was, 'You're a pop star! That means you have to be blonde, and you have to have long hair, and you have to put on some glittery tight thing,'" she said. "Meanwhile, I'm this fragile little girl playing a 16-year-old in a wig and a ton of makeup. It was like Toddlers & Tiaras. I had fucking flippers."
The September issue of Marie Claire hits newsstands Aug. 18.